Smelting residue flash magnetizing roast comprehensive recycling technology

Abstract

The invention belongs to the metallurgical industry, and particularly relates to a smelting residue flash magnetizing roast comprehensive recycling technology. The technology is realized as follows: drying and thrashing smelting residues to obtain a powdery material with the moisture content not more than 3% and the particle size of -0.074 not less than 80%; preheating the powdery material and then roasting in a magnetized roaster at the temperature of 750-780 degree C; separating gas from solid and cooling; grinding, grading and concentrating roasted ore; all-sliming cyanidation leaching gold and silver; recycling gold and silver through carbon absorption to obtain gold and silver active carbon; and cyaniding tailings and performing magnetic separation to obtain iron ore concentrate. The technology disclosed by the invention can solve problems about treatment of gold, silver and iron smelting residues, not only can comprehensively recycle gold, silver and iron, but also can reduce pollution of the smelting residues to the environment, as a result, the waste is turned into the wealth, the national policy of energy conservation and emission reduction is met, certain economic benefits are created for an enterprise, and the pollution to the environment is reduced.

Description

technical field [0001] The invention belongs to the metallurgical industry, in particular to a comprehensive recovery and utilization process of smelting waste slag flash magnetization roasting. Background technique [0002] Gold smelters and sulfuric acid plants contain about 1.50g / t of gold, 35.0g / t of silver, and 35% of iron in the smelting waste residues of gold smelters and sulfuric acid plants, of which -200 mesh ≥ 80%. , and then cyanide leaching gold and silver, so the gold and silver minerals in the waste residue cannot be recovered by traditional methods, and the iron in it is not suitable for sorting because it has not been magnetized, so basically there is no use value, so most of them are not used. It is piled up in the waste residue yard, and only a small part is sold to the cement factory at a low price. This treatment method that not only takes up a large amount of farmland, pollutes the environment, but also wastes resources needs to be improved. Contents...

AI Technical Summary

Problems solved by technology

[0002] Gold smelters and sulfuric acid plants contain about 1.50g / t of gold, 35.0g / t of silver, and 35% of iron in the smelting waste residues of gold smelters and sulfuric acid plants, of which -200 mesh ≥ 80%. , and then cyanide leaching gold and silver, so the gold and silver minerals in the waste residue cannot be recovered by traditional methods, and the iron in it is not suitable for sorting because it has not been magnetized, so basically there is no use value, so most of them are not used. It is piled up in the waste residue yard, and only a small part is sold to the cement factory at a low price

This kind of processing method that not only occupies a large amount of farmland, pollutes the environment, but also wastes resources needs to be improved.

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